This morning on my ride to work my watch thought I had been in a fall/accident, I did hear a noise but thought it was a house alarm, then in the woods I heard another noise so stopped checked my watch but couldn't see anything, carried on for a bit and then my phone rang, stopped and answered it thinking it was the wife, oh no it was the Metropolitan Police, after telling them what had happened they were fine, they must get this sort of alert a lot, then my wife rang as she also received a message, all was good and now I know it does work, although I don't know why it did this time.